Python Caller - How to set feature as a global

In my python caller script I can not access to feature outside of the function checkViewer(). I would like to be able to access it in the Index() class.

 

 

How can I make the feature as a global variable?

 

 

import fmeobjects

 

import json

 

import matplotlib.pyplot as plt

 

from matplotlib.widgets import Button

 

from descartes import PolygonPatch

 

 

      

 

def checkViewer(feature):

 

    BLUE = '#6699cc'

 

    geometry = feature.getAttribute('_geometry')

 

    geoJson = json.loads(geometry)

 

    fig = plt.figure()

 

    ax = fig.gca()

 

    ax.add_patch(PolygonPatch(geoJson, fc=BLUE, ec=BLUE, alpha=0.5, zorder=2 ))

 

    ax.axis('scaled')

 

   

 

    callback = Index()

 

    axprev = plt.axes([0.7, 0.05, 0.1, 0.075])

 

    axnext = plt.axes([0.81, 0.05, 0.1, 0.075])

 

    bnext = Button(axnext, 'Garder')

 

    bnext.on_clicked(callback.garder)

 

    bprev = Button(axprev, 'Rejeter')

 

    bprev.on_clicked(callback.rejeter)

 

   

 

    plt.show()

 

 

 

class Index():

 

    def __init__(self):

 

        self.feature = feature

 

       

 

    def gader(self, event):

 

        plt.close()

 

        feature.setAttribute('check', "yes") #this is not working because feature is not global

 

 

    def rejeter(self, event):

 

        plt.close()

 

        feature.setAttribute('check', "no") #this is not working